Package & Size You will receive a tree stump remover tool set, which includes 23 pieces copper nails, 1 piece stainless steel nail, 1 piece cobalt drill bit nail, enough quantity to meet daily use and replacement needs. The size of copper nails and stainless steel nails is 3.5 x 3.5 mm, the size of the drill bit nail is 2.7 x 3.5 mm. How to use the nail set: Make pilot holes with a drill bit and stainless steel nails, then hammer the copper nails into the hole, and finally pull out the nails evenly around the base of the trunnion. Remove Tree Stumps: Our copper nails disrupt tree growth by releasing excess copper ions, helping to remove trees and stumps. Premium material: these hardware nails are mainly made of pure copper and stainless steel, which are sturdy, rust-proof and anti-corrosion, and have a long service life; The drill bit is made of high-speed steel containing cobalt, which is resistant to , wear and deformation. Protect surrounding plants: Copper nails are used to remove tree stumps and without affecting surrounding plants., Weight: 0.35494424182 pounds, Manufacturer: Rtxbvg